Exhaust for steam-engines



2' sheets-sheet 1.

(No Model.)

` J. W. CLO'UD; EXHAUST EOE STEAM ENGINES.

Patented Sept. 19, 1898.

2 Sheets-Sheet 2,

(No Model.)

J. W.v cLoUD. EXHAUST FOR STEAM ENGINES.

10.505,190 Patenteasept. 19, 189s.

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[fir/156656 UNITED STATES PATENT OFFICE..v

JOHN WILLS CLOUD, OF CHICAGO, ILLINOIS.

EXHAUST FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 505,190, datedSeptember 19, 1893. Application filed January 9, 18953. Serial No.457,738. (No model.)

To all whom t may concern:

Be it known that I, JOHN WILLs CLOUD, a citizen of the United States,residing at the city of Chicago, in the county of Cook and State ofIllinois, have invented a certain new Vand Improved Exhaust forSteam-Engines, of

which the following is a true and exact description, reference being hadto the drawings which accompany this specification and form a partthereof.

My invention relates to engines in which the exhaust steam is deliveredinto a smoke box or stack and there utilized for increasing the draft ofthe furnace. An objectionable feature of this arrangement as heretoforeemployed has been that the action of the exhaust steam is at timesexcessive and at other times less than could be desired and the objectof my invention is to equalize the action of the exhaustwhich Iaccomplish by providing what I call a steam accumulator chamber situatedin the smoke box and connected with the exhaust passages below thedelivery end of the `exhaust nozzle.

My invention is peculiarly adapted for use in connection with locomotiveengines, and further details of my improvement consist in the specialarrangement of the parts in the locomotive smoke-box, which will best beunderstood as explained in connection with the drawings, in which-Figure 1, is an elevation showing the inside of the smoke box and thesaddle casting containing the steam passages leading to and from thecylinders. Fig. 2, is a longitudinal section on the line yy of Fig. l;Fig. 3, an elevation of the inside of the smoke-box of a locomotive ofthe usual construction showing a convenient way of applying my inventionto it, and, Fig. 4, a longitudinal section on the line -x of Fig. 3.

A, indicates the shell of the boiler; B, the smoke-box inclosed by thesheet B which sheet is reinforced by the rings B2 B2.

C, indicates the dry pipe; C' C', the connections from the dry pipe tothe steam passages leading to the cylinders.

D,is the exhaust nozzle connecting as shown with the steam passages E Eleadingfrom the cylinders, the steam passages both to and fromthecylinders beingin the designs shown, formed in the saddle castingindicated by I.

Within the smoke box I form chambers as G G. These are formed so as toextend along the rounded sides of the smoke box and be out of the lineof boiler fines.. Thus they do not impede the draft nor interfere withthe proper cleaning of the flues. These chambers may if desired beconnected together, although this is not necessary. These chambers areformed between the sheet B and an internal rounded sheet G which isriveted to the rings B2 B2 and at the top to cross-bars In theconstruction shown in Figs. l and 2, openings F F are formed in thesaddle casting I so as to open into the chambers G G.

Where my invention is to be applied to existing smoke-boxes thenecessary connection can be conveniently made as shown in Figs. 3 and4., openings D D being formed in the nozzle, D and conduits F F securedabout these openings and leading therefrom to the chambers G G. It willbe noticed that in the construction shown in Figs. 3 and 4:, the lowerends of the chambers G Gare formed by crossbars I-I I-I similar to thebars H I-I.

The action of the auxiliary chambers G G will be easily understood.There is more or less resistance to the escape of the exhaust steamthrough the nozzle which is generally of a tapered form as indicated,and this resistance of course is greater in proportion to the pressureand velocity ofthe exhaust steam. In consequence of this resistance aportion of the exhauststeam passes through the openings or conduitsleading into chambers G G and is so to speak, stored in these chambersunder more or less pressure. The quantity and pressure of the steam inthe chambers G will also obviously vary with the resistance to theescape of steam through the nozzle. Consequently when the exhaust isexcessive a considerable amount will pass into and be stored in thechambers G, and this stored steam will 9 5 ICO l. In an engine thecombination with the smoke box of an exhaust nozzle opening therein, andan exhaust steam accumulator chamber connected with the nozzle below itsdelivery end and extending upward therefrom along the sides of the smokebox, substantially as described and so as to be out of line with theboiler tubes and of the line of draft therefrom.

2. In an engine the combination with the smoke box of an exhaust nozzleopening therein, and exhaust steam accumulator chambers connected withthe nozzle below its delivery end and extending upward therefrom in bothdirections along both sides of the smoke box v JOHN WILLS CLOUD.

'Witnesses:

JOSEPH W. TAYLOR, CHARLES D. EWER.

